Arithmetic and control unit



FIG. 1 is a top, left, front perspective view of a first embodiment ofan arithmetic and control unit showing my new design;

FIG. 2 is a top, right, rear perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a left side elevational view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is bottom plan view thereof; and

FIG. 9 is a left side elevational view thereof wherein the disc trayportion is in the open position, the disc tray portion in broken linesis for illustrative purposes only and forms no part of the claimeddesign;

FIG. 10 is a front elevational view of a second embodiment of anarithmetic and control unit showing my new design;

FIG. 11 is a rear elevational view thereof;

FIG. 12 is a right side elevational view thereof;

FIG. 13 is a left side elevational view thereof;

FIG. 14 is a top plan view thereof;

FIG. 15 is bottom plan view thereof; and

FIG. 16 is a left side elevational view thereof wherein the disc trayportion is in the open position, the disc tray portion in broken linesis for illustrative purposes only and forms no part of the claimeddesign;

FIG. 17 is a front elevational view of a third embodiment of anarithmetic and control unit showing my new design;

FIG. 18 is a rear elevational view thereof;

FIG. 19 is a right side elevational view thereof;

FIG. 20 is a left side elevational view thereof;

FIG. 21 is a top plan view thereof;

FIG. 22 is bottom plan view thereof; and,

FIG. 23 is another left side elevational view thereof wherein the disctray portion is in the open position, the disc tray portion in brokenlines is for illustrative purposes only and forms no part of the claimeddesign.

The ornamental design for an arithmetic and control unit, as shown anddescribed.